A horse is a horse, of course, of course, And no one can talk to a horse of course That is, of course, unless the horse is the famous Mr. Ed.

Go right to the source and ask the horse He'll give you the answer that you'll endorse. He's always on a steady course. Talk to Mr. Ed.

People yakkity yak a streak and waste your time of day But Mister Ed will never speak unless he has something to say.

A horse is a horse, of course, of course, And this one'll talk 'til his voice is hoarse. You never heard of a talking horse?

Well listen to this.

I am Mister Ed.

source: http://www.lyricsondemand.com/tvthemes/mredlyrics.html